Antutu 3DBench is a free benchmarking tool where you can simply check how fast is your Android smartphone or tablet at rendering three-dimensional scenes. You can use the results to have an idea regarding how well your device will perform at running video games. This application comes with three scenarios: Marooned based on OpenGL3.0, Coastline made with OpenGL3.1 and OpenGL3.1+AEP-based Refinery.
All these tests will go pretty hard on the hardware of your device, and you will know for sure how well your smartphone will run mobile games. This software is capable of automatically detecting the API level supported by your device, and the recommended 3D tests will start to measure the performance. Please keep in mind that this test shows how your device will perform while running serious games, not simple ones like poker, chess, etc.
In case the score is really low, you basically shouldn't try to run mobile games like PUBG on your current smartphone or tablet.